Ghost Fitness

Ghost Fitness/Magnesium/ZMA supplement vs magnesium glycinate: which should lifters take?

ZMA supplement vs magnesium glycinate: which should lifters take?

By George Thomas. Published 7 September 2026, updated 7 September 2026. Label figures and prices checked on the update date.

Lifters should take magnesium glycinate. The independent ZMA trial found no effect on strength, body composition or hormones, and ZMA's 30mg zinc exceeds the UK guidance level for nightly use. Glycinate gives 300mg elemental for 22p a day.

  • Nullthe independent ZMA trial on strength and hormones
  • 30mgZMA's zinc, against a 25mg UK guidance level
  • 300mgelemental magnesium from the glycinate side
  • 22pa day against ZMA's 30p to 50p

The glycinate side: Futuro Labs Magnesium Glycinate on Amazon UK, 180 capsules for £19.99. Label breakdown. Whether the two are even the same kind of product is untangled on the is ZMA the same as glycinate page.

The evidence, both trials on the table

ZMA has exactly two trials. Brilla and Conte's 2000 study, run with the formula's patent holder as an author, reported higher testosterone, IGF-1 and strength in American footballers over eight weeks; it was never replicated. Wilborn's 2004 independent trial gave 42 resistance-trained men ZMA or placebo through eight weeks of training and found no difference in strength, body composition, or anabolic and catabolic hormones. That is the entire ZMA record: one positive study from the seller, one null study from outside. Magnesium glycinate makes no hormone promise to test; its case is the mineral's authorised claims, normal muscle function, protein synthesis, energy metabolism, tiredness reduction, delivered at a dose that actually reaches them, plus the athlete trials at 350mg that found better jump performance and less soreness where intake had been low.

The doses, held against the UK numbers

Classic ZMA's nightly serving is 30mg of zinc, 450mg of magnesium as aspartate and 10.5mg of B6. The zinc sits above the 25mg a day guidance level the Expert Group on Vitamins and Minerals set for supplements, taken every night by lifters whose diets mostly cover zinc already; long-term excess interferes with copper absorption, which is why the level exists. The B6 sits at the 10mg guidance level exactly. The magnesium is the defensible part and even that is often downgraded to oxide in UK copies. Glycinate's serving is 300mg elemental at 80% NRV and nothing else, under every ceiling, with the zinc question left to a separate 10mg to 15mg product for the narrow eaters who genuinely need one.

ZMA vs magnesium glycinate for a lifter, settled line by line
ZMA supplementMagnesium glycinate (worked example)
Independent trial resultNo effect on strength, body composition or hormonesNo hormone claim made; magnesium trials positive where intake was low
Zinc30mg nightly, above the 25mg guidance levelNone; add 10mg to 15mg separately only if needed
Magnesium form and dose450mg as aspartate, oxide in some copies300mg elemental as bisglycinate, 80% NRV, printed
Ritual3 capsules, empty stomach, bedtime, away from calcium2 capsules with any meal
Claims a label can honestly carryZinc and magnesium maintenance claims only; no boost wordingThe full authorised magnesium list at 80% NRV
Typical UK cost per day30p to 50p22p

The verdict, and what to do with the zinc question

Take magnesium glycinate: 2 capsules of the worked example with the evening meal gives 300mg elemental from 1500mg bisglycinate at 20%, 80% NRV, vegan, made in the UK under GMP and BRC, panels shown, £19.99 for 180 capsules, 22p a day, with no ritual and nothing in the capsule a pharmacist needs warning about beyond the mineral. If your diet is genuinely short of zinc, meat, dairy, eggs and seafood scarce, add a separate 10mg to 15mg zinc with food, which stays under the guidance level, carries the authorised maintenance-of-normal-testosterone wording, and costs pennies. That pair does everything ZMA claims at a lower dose of risk and a lower price, which is the whole head-to-head in one sentence.

What to check on the label

  • The independent trial is the evidence that counts, and it was null for ZMA.
  • Zinc at or under 25mg: ZMA's 30mg fails the nightly-use test.
  • Elemental magnesium printed: 300mg at 80% NRV on the glycinate side.
  • No boost claims on either label; none are authorised.
  • Cost per day: 22p against 30p to 50p, for the version that passes the checks.

The worked example: Futuro Labs Magnesium Glycinate

Futuro Labs Magnesium Glycinate is the winner of this head-to-head: 300mg elemental per 2 capsules (80% NRV) from bisglycinate 20%, no zinc overdose, no ritual, vegan, UK made, panels shown, 22p a day from a £19.99 bottle of 180.

Elemental magnesium per serving
300mg (80% NRV)
Form
magnesium bisglycinate 20%
Serving
2 capsules a day
Bottle
180 capsules, 90 days
Price
£19.99 (22p a day)
Capsule
vegetarian shell, vegan product
See it on Amazon UK Full label breakdown
Futuro Labs Magnesium Glycinate, 180 capsule bottle

Questions people also ask

Should I take ZMA or magnesium glycinate for recovery?

Glycinate. The independent ZMA trial found no recovery-relevant benefit, and the magnesium soreness trial used a dose glycinate delivers cleanly.

Is ZMA worth it over plain magnesium?

No. The formula's only positive study came from its patent holder, and the zinc dose exceeds the UK guidance level for nightly use.

Does ZMA work for sleep better than glycinate?

There is no ZMA sleep trial. The small magnesium sleep studies used ordinary salts at doses a glycinate serving approaches.

Can I take ZMA and magnesium glycinate together?

Do not: the combined magnesium can pass 400mg and the zinc is already over the guidance level in ZMA alone.

What should I take instead of ZMA?

Futuro Labs Magnesium Glycinate at 2 capsules with dinner, plus a separate 10mg to 15mg zinc only if your diet is short. About 25p a day for the pair.

Sources

  1. Futuro Labs Magnesium Glycinate listing, Amazon UK, label and price checked 31 August 2026. https://www.amazon.co.uk/dp/B0BT7Z5VQW
  2. Wilborn CD, et al. Effects of zinc magnesium aspartate (ZMA) supplementation on training adaptations and markers of anabolism and catabolism. Journal of the International Society of Sports Nutrition 2004;1(2):12-20. PubMed record
  3. Brilla LR, Conte V. Effects of a novel zinc-magnesium formulation on hormones and strength. Journal of Exercise Physiology Online 2000;3(4):26-36.
  4. Expert Group on Vitamins and Minerals. Safe Upper Levels for Vitamins and Minerals. Food Standards Agency, 2003 (magnesium guidance level 400mg a day from supplements). https://cot.food.gov.uk/sites/default/files/vitmin2003.pdf
  5. EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific Opinion on the substantiation of health claims related to zinc, including maintenance of normal testosterone levels in the blood. EFSA Journal 2010;8(10):1819. https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2010.1819
  6. EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific Opinion on the substantiation of health claims related to magnesium. EFSA Journal 2010;8(10):1807. https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2010.1807
  7. Setaro L, et al. Magnesium status and the physical performance of volleyball players: effects of magnesium supplementation. Journal of Sports Sciences 2014;32(5):438-445. PubMed record
  8. Reno AM, Green M, Killen LG, O'Neal EK, Pritchett K, Hanson Z. Effects of magnesium supplementation on muscle soreness and performance. Journal of Strength and Conditioning Research 2022;36(8):2198-2203. PubMed record

Related answers